People/ChangzhiLi's [Attach:osgShadow.zip osgShadow] nodekit which adds stencil shadow volume rendering (License : proprietary although the intent was probably to publish it under the GNU GPL or GNU LGPL but the distribution does not contain any mention of the licensing terms which makes it proprietary).

[Attach:osgGL2.zip osgGL2] - Mike Weiblen's original KnowledgeBase?/OpenGL Shading Language node kit. Since support for KnowledgeBase?/OpenGL Shading Language has moved into the OSG core, osgGL2 is obsolete.
*osgEphemeris - An Ephemeris Model for OSG.
*osgTDS - Terrain Deformation Software for OSG.

Parallel-Split Shadow Maps : I started with the openscenegraph integration, i would be very pleased if the community would support me. more information about PSSM, have a look at GameDev, to get involed please contact Adrian Egli [3dhelp (@) gmail.com]

People/LeandroMottaBarros's OSGUIsh. OSGUIsh allows a programer to register callbacks that are called when GUI-like events happen on scene graph nodes. So, you can have some code executed whenever the user clicks a certain node, or moves the mouse over it, or turns the mouse wheel, or... (License: OSGPL)